EP3763286A1 - Fingerring zur überwachung multiplexierter physiologischer parameter einer elektrode - Google Patents

Fingerring zur überwachung multiplexierter physiologischer parameter einer elektrode Download PDF

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Publication number
EP3763286A1
EP3763286A1 EP18912518.0A EP18912518A EP3763286A1 EP 3763286 A1 EP3763286 A1 EP 3763286A1 EP 18912518 A EP18912518 A EP 18912518A EP 3763286 A1 EP3763286 A1 EP 3763286A1
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EP
European Patent Office
Prior art keywords
electrode
monitoring
module
electrocardiogram
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18912518.0A
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English (en)
French (fr)
Other versions
EP3763286A4 (de
Inventor
Congcong ZHOU
Jun Hu
Haiquan Yuan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hangzhou Megasens Technologies Co Ltd
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Hangzhou Megasens Technologies Co Ltd
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Publication date
Application filed by Hangzhou Megasens Technologies Co Ltd filed Critical Hangzhou Megasens Technologies Co Ltd
Publication of EP3763286A1 publication Critical patent/EP3763286A1/de
Publication of EP3763286A4 publication Critical patent/EP3763286A4/de
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/024—Measuring pulse rate or heart rate
    • A61B5/02438—Measuring pulse rate or heart rate with portable devices, e.g. worn by the patient
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
    • A61B5/024—Measuring pulse rate or heart rate
    • A61B5/02444—Details of sensor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
    • A61B5/053—Measuring electrical impedance or conductance of a portion of the body
    • A61B5/0531—Measuring skin impedance
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A61B5/282—Holders for multiple electrodes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A61B5/304—Switching circuits
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/30—Input circuits therefor
    • A61B5/307—Input circuits therefor specially adapted for particular uses
    • A61B5/308—Input circuits therefor specially adapted for particular uses for electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/316—Modalities, i.e. specific diagnostic methods
    • A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
    • A61B5/6813—Specially adapted to be attached to a specific body part
    • A61B5/6825—Hand
    • A61B5/6826—Finger
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
    • A61B5/7225—Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/02—Operational features
    • A61B2560/0204—Operational features of power management
    • A61B2560/0214—Operational features of power management of power generation or supply

Definitions

  • the present invention relates to the field of health medical device, and specifically, to an electrode multiplexing physiological parameter monitoring ring.
  • wearable devices have become more and more widely used.
  • existing wearable devices require at least two electrodes to collect electrocardiogram signals for electrocardiogram monitoring and heart rate monitoring.
  • four additional electrodes which are different from the electrodes for collecting the electrocardiogram signals are employed in the existing wearable devices to collect skin impedance signals, wherein a pair of electrodes is used as an excitation source to generate a signal, and another pair of electrodes is used as a collection end to collect a corresponding voltage signal. It can be seen that the existing wearable device has a large number of electrodes, high redundancy, complicated system design, and cannot implement device miniaturization.
  • the present invention provides an electrode multiplexing physiological parameter monitoring ring.
  • Embodiments of the present invention disclose an electrode multiplexing physiological parameter monitoring ring, including a built-in power supply, a microprocessor module, an electrocardiogram monitoring analog front end, a skin conductance monitoring module, a first electrode, and a second electrode.
  • the microprocessor module is connected to the electrocardiogram monitoring analog front end and the skin conductance monitoring module.
  • the first electrode and the second electrode are separately connected to the electrocardiogram monitoring analog front end, and the electrocardiogram monitoring analog front end processes electrocardiogram signals collected by the first electrode and the second electrode.
  • the first electrode and the second electrode are further separately connected to the skin conductance monitoring module, and the skin conductance monitoring module processes skin impendence signals collected by the first electrode and the second electrode.
  • a coupling manner in which the first electrode and the second electrode are coupled to the electrocardiogram monitoring analog front end is direct current coupling or alternating current coupling, and is opposite to a coupling manner in which the first electrode and the second electrode are coupled to the skin conductance monitoring module.
  • the ring further includes a power supply management module connected to the microprocessor module.
  • the first electrode and the second electrode are separately connected to the built-in power supply through the power supply management module.
  • the power supply management module is configured to: when the first electrode and the second electrode are in contact with skin, form an open circuit between the first electrode and the built-in power supply, and when the first electrode and the second electrode are connected to an external charger, form a closed-circuit between the first electrode and the built-in power supply.
  • the microprocessor module is configured to: when the closed-circuit is formed between the first electrode and the built-in power supply, make the electrocardiogram monitoring analog front end and the skin conductance monitoring module stop working.
  • the ring further includes a third electrode connected to the electrocardiogram monitoring analog front end.
  • the electrocardiogram monitoring analog front end processes electrocardiogram signals collected by the first electrode, the second electrode, and the third electrode.
  • the third electrode is coupled to the electrocardiogram monitoring analog front end in a manner of direct current coupling.
  • the skin conductance monitoring module includes a signal excitation module and a signal processing module.
  • the signal excitation module includes a current source, a first resistor, a second resistor, a first capacitor, and a second capacitor.
  • One end of the first resistor is connected to the current source, the other end of the first resistor is connected to the first capacitor, and the other end of the first capacitor is connected to the first electrode.
  • One end of the second capacitor is connected to the current source, the other end of the second capacitor is connected to the second capacitor, and the other end of the second capacitor is connected to the second electrode.
  • the signal excitation module generates an alternating current with a frequency higher than 32 kHz and amplitude lower than 100 ⁇ A.
  • the signal processing module includes a third capacitor, a fourth capacitor, a band-pass filter, and a low-pass filter.
  • One end of the third capacitor is connected to the first electrode, the other end of the third capacitor is connected to the band-pass filter, and the other end of the band-pass filter is connected to the low-pass filter.
  • One end of the fourth capacitor is connected to the second electrode, and the other end of the fourth capacitor is connected to the band-pass filter.
  • the power supply management module includes a third resistor, a fourth resistor, a bias voltage, and a voltage control switch.
  • One end of the third resistor is connected to the first electrode and the voltage control switch, the other end of the third resistor is connected to the fourth resistor, and the other end of the fourth resistor is connected to the bias voltage.
  • the other end of the voltage control switch is connected to a connection point of the third resistor and the fourth resistor.
  • the other end of the voltage control switch is connected to the built-in power supply.
  • the bias voltage is greater than 2 V and less than 3.3 V.
  • a first electrode and a second electrode are multiplexed, so that electrocardiogram monitoring, heart rate monitoring, and skin conductance monitoring can be implemented by using only two electrodes; and the electrocardiogram monitoring, the heart rate monitoring, and the skin conductance monitoring do not interfere with each other, because the first electrode and the second electrode are separately coupled to the electrocardiogram monitoring analog front end and the skin conductance monitoring module in different coupling manners.
  • the physiological parameter monitoring ring in the embodiments of the present invention can reduce the number of electrodes, simplify system design, and implement device miniaturization.
  • a charging function can be implemented by the first electrode and the second electrode, and the physiological parameter monitoring function and the charging function can be automatically switched, so that system complexity is further reduced, and lower power consumption is implemented.
  • three electrodes are used to collect the electrocardiogram signal, so that effects of electrocardiogram monitoring and heart rate monitoring can be improved.
  • FIG. 1 is a schematic diagram of function modules of an electrode multiplexing physiological parameter monitoring ring according to an embodiment of the present invention.
  • the electrode multiplexing physiological parameter monitoring ring includes a microprocessor module 1, a built-in power supply 2, an electrocardiogram monitoring analog front end 3, a skin conductance monitoring module 4, a first electrode 6, and a second electrode 2.
  • the microprocessor module 1 is connected to the electrocardiogram monitoring analog front end 3 and the skin conductance monitoring module 4.
  • the first electrode 6 and the second electrode 7 are separately connected to the electrocardiogram monitoring analog front end 3.
  • the electrocardiogram monitoring analog front end 3 processes electrocardiogram signals collected by the first electrode 6 and the second electrode 7.
  • the first electrode 6 and the second electrode 7 are further separately connected to the skin conductance monitoring module 4.
  • the skin conductance monitoring module 4 processes skin impendence signals collected by the first electrode 6 and the second electrode 7.
  • a coupling manner in which the first electrode 6 and the second electrode 7 are coupled to the electrocardiogram monitoring analog front end 3 is direct current coupling or alternating current coupling, and is opposite to a coupling manner in which the first electrode 6 and the electrode 7 are coupled to the skin conductance monitoring module 4.
  • the first electrode 6, the second electrode 7, and the electrocardiogram monitoring analog front end 3 constitute a single-lead electrocardiogram monitoring structure, to implement single-lead electrocardiogram monitoring and heart rate monitoring.
  • the first electrode 6, the second electrode 7, and the skin conductance monitoring module 4 constitute a skin conductance monitoring structure to implement skin conductance monitoring.
  • the first electrode 6 and the second electrode 7 are multiplexed, so that the physiological parameter monitoring ring of this embodiment of the present invention can implement electrocardiogram monitoring, heart rate monitoring, and skin conductance monitoring simultaneously with only two electrodes; and because the first electrode 6 and the second electrode 7 are separately coupled to the electrocardiogram monitoring front end 3 and the skin conductance monitoring module 4 in different coupling manners, the electrocardiogram monitoring, the heart rate monitoring, and the skin conductance monitoring will not interfere with each other.
  • the physiological parameter monitoring ring in this embodiment of the present invention can reduce the number of electrodes, simplify system design, and implement device miniaturization.
  • the microprocessor module 1 controls electrocardiogram monitoring and skin conductance monitoring, and receives and processes the signals from the electrocardiogram monitoring analog front end 3 and the skin conductance monitoring module 4.
  • the microprocessor module 1 is connected to the electrocardiogram monitoring analog front end 3 through an SPI interface, an I2C interface, or an ADC interface.
  • the microprocessor module 1 is connected to the skin conductance monitoring module 4 through an IO interface or the ADC interface.
  • the built-in power supply 2 supplies power to constituent modules inside the ring according to the needs of the system design.
  • the electrocardiogram monitoring analog front end 3 may be connected to the first electrode 6 and the second electrode 7 by direct current coupling, and processes (for example, amplifies or filters) the electrocardiogram signals collected by the first electrode 6 and the second electrode 7.
  • the electrocardiogram monitoring analog front end 3 may be an AFE of ADS series of TI Company, or may be a product of ADI Company with similar functions.
  • FIG. 2 is a schematic diagram of electrode distribution of an electrode multiplexing physiological parameter monitoring ring according to an embodiment of the present invention.
  • the first electrode 6 and the second electrode 7 may be located on the same side of the ring.
  • the first electrode 6 and the second electrode 7 are located on the inner side that is in contact with the skin.
  • the first electrode 6 and the second electrode 7 can also be located in different sides of the ring.
  • the first electrode 6 is located on the outer side of the ring
  • the second electrode 7 is located on the inner side of the ring.
  • the electrode multiplexing physiological parameter monitoring ring preferably includes a third electrode 8 which is connected to the electrocardiographic monitoring analog front end 3 by direct current coupling.
  • the electrocardiogram monitoring analog front end 3 processes electrocardiographic signals collected by the electrode 6, the second electrode 7, and the third electrode 8, that is, the first electrode 6, the second electrode 7, and the third electrode 8, and the electrocardiographic monitoring analog front end 3 constitute a single-lead electrocardiogram monitoring structure to implement single-lead electrocardiogram monitoring and heart rate monitoring.
  • the third electrode 8 may be located on the outer side of the ring.
  • FIG. 3 is a schematic circuit diagram of a skin conductance monitoring module 4 of an electrode multiplexing physiological parameter monitoring ring according to an embodiment of the present invention.
  • the skin conductance monitoring module 4 includes a signal excitation module 9 and a signal processing module 10.
  • the signal excitation module 9 is used for generating a constant current source, and the signal processing module 10 is used for collecting and demodulating a received signal.
  • the signal excitation module 9 generates an alternating current with a frequency greater than 32 kilohertz and amplitude lower than 100 microamperes.
  • the alternating current generated by the signal excitation module 9 is square wave.
  • the signal excitation module 9 includes a current source U1 for generating an alternating current, and the current source U1 is connected to the multiplexed electrode through a resistor-capacitor network.
  • the current source U1 is connected to the first electrode 6 through a resistor R1 and a capacitor C1, and is connected to the second electrode 7 through a resistor R2 and a capacitor C2.
  • the signal excitation module 9 is coupled to the body tissue through the first electrode 6 and the second electrode 7, so that alternating voltage signals with the same frequency are generated.
  • the alternating voltage signals are collected and demodulated by the signal processing module 10 by alternating current coupling.
  • the signals collected by the first electrode 6 and the second electrode 7 are inputted to a band-pass filter module 11 through two sampling capacitors C3 and C4 respectively, low-pass filtering is performed on the band-pass filtered signals by a low-pass filter 12, and the filtered signals are transmitted to the microprocessor module 1.
  • the first electrode 6 and the first electrode 7 are used to generate an excitation signal as well as collect a signal, which reduces the number of electrodes for skin conductance monitoring to two.
  • the electrocardiographic monitoring analog front end 3 is connected to the first electrode 6 and the second electrode 7 by direct current coupling
  • the skin conductance monitoring module 4 is connected to the first electrode 6 and the second electrode 7 by alternating current coupling
  • the electrocardiographic signal and the skin impedance signal collected by the first electrode 6 and the second electrode 7 will not interfere with each other.
  • the electrocardiographic monitoring analog front end 3 may be connected to the first electrode 6 and the second electrode 7 by alternating current coupling
  • the skin conductance monitoring module 4 may be connected to the first electrode 6 and the second electrode 7 by direct current coupling.
  • FIG. 4 is a schematic diagram of another function module of an electrode multiplexing physiological parameter monitoring ring according to an embodiment of the present invention.
  • the electrode multiplexing physiological parameter monitoring ring may further include a power supply management module 5 connected to the microprocessor module 1.
  • the first electrode 6 and the second electrode 7 are separately connected to a built-in power supply 2 through the power supply management module 5.
  • the power supply management module 5 is configured to: when the first electrode 6 and the second electrode 7 are in contact with the skin, from an open circuit between the first electrode 6 and the built-in power supply 2; and when the first electrode 6 and the second electrode 7 are connected to an external charger, form a closed-circuit between the first electrode 6 and the built-in power supply 2.
  • the microprocessor module is configured to: when the closed-circuit is formed between the first electrode 6 and the built-in power supply 2, make the electrocardiogram monitoring analog front end 3 and the skin conductance monitoring module 4 stop working.
  • the first electrode 6, the second electrode 7, the power supply management module 5, and the built-in power supply 2 constitute a charging structure, and the first electrode 6 and the second electrode 7 are used as charging interfaces to charge the built-in power supply 2.
  • the physiological parameter monitoring ring can implement the electrocardiogram monitoring, the heart rate monitoring, the skin conductance monitoring, and a charging function by multiplexing the first electrode 6 and the second electrode 7, so that the number of electrodes can be further reduced, system design can be simplified, and the device can be further miniaturized.
  • the physiological parameter monitoring function and the charging function of the physiological parameter monitoring ring can be automatically switched, so that system complexity is further reduced, and lower power consumption is implemented.
  • the microprocessor module 1 may be connected to the power supply management module 5 through an IO interface.
  • the power supply management module 5 includes resistors R3 and R4, a bias voltage Vbias of the system, and a voltage control switch K1.
  • the bias voltage Vbias is connected to the first electrode 6 through the resistors R3 and R4.
  • the Vbias voltage is greater than 2V and less than 3.3V
  • the voltage control switch K1 is used for controlling the first electrode 6 to connect to a connection point of the resistors R3 and R4, or connect to one pole of the built-in power supply 2.
  • the voltage difference between the body surface electrodes is at an mV level.
  • the voltage on the first electrode 6 is smaller than the Vbias voltage
  • the voltage control switch K1 connects the first electrode 6 and the connection point of the resistors R3 and R4, there is an open circuit between the first electrode 6 and the built-in power supply 2, and the built-in power supply 2 is not charged.
  • the voltage control switch K1 connects the first electrode 6 to one pole of the built-in power supply 2, there is a closed-circuit between the first electrode 6 and the built-in power supply 2, and the built-in power supply 2 is charged.
  • the microprocessor module 1 controls, by an analog switch, the power supply of the electrocardiogram monitoring analog front end 3 and the skin conductance monitoring module 4 to be turned off, so as to make the physiological parameter monitoring module stop working.
  • the switching between the physiological parameter monitoring function and the charging function is automatically controlled by the voltage control switch K1, so that the built-in power supply is not charged when the physiological parameter detection is performed, and the physiological parameter monitoring is not performed when the built-in power supply is charged, and the two functions do not affect each other.

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EP18912518.0A 2018-03-29 2018-12-07 Fingerring zur überwachung multiplexierter physiologischer parameter einer elektrode Withdrawn EP3763286A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810269936.2A CN110313906B (zh) 2018-03-29 2018-03-29 一种电极复用生理参数监测指环
PCT/CN2018/119855 WO2019184440A1 (zh) 2018-03-29 2018-12-07 一种电极复用生理参数监测指环

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EP3763286A4 EP3763286A4 (de) 2021-08-04

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CN110313906B (zh) 2024-09-27
US20210321893A1 (en) 2021-10-21
WO2019184440A1 (zh) 2019-10-03
US11504018B2 (en) 2022-11-22
CN110313906A (zh) 2019-10-11
SG11201906112YA (en) 2019-11-28

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